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BUG: KCSAN: data-race in fifo_open / wait_for_partner

read-write to 0xffff888114f6912c of 4 bytes by task 2415 on cpu 1:
 put_pipe_info fs/pipe.c:712 [inline]
 fifo_open+0x2a6/0x5e0 fs/pipe.c:1226
 do_dentry_open+0x63c/0xbe0 fs/open.c:955
 vfs_open+0x4a/0x60 fs/open.c:1089
 do_open fs/namei.c:3642 [inline]
 path_openat+0x18ba/0x1d80 fs/namei.c:3799
 do_filp_open+0xf7/0x200 fs/namei.c:3826
 do_sys_openat2+0xab/0x120 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_open fs/open.c:1429 [inline]
 __se_sys_open fs/open.c:1425 [inline]
 __x64_sys_open+0xe6/0x110 fs/open.c:1425
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

read to 0xffff888114f6912c of 4 bytes by task 2400 on cpu 0:
 pipe_lock fs/pipe.c:91 [inline]
 wait_for_partner+0x106/0x1e0 fs/pipe.c:1093
 fifo_open+0x4cc/0x5e0 fs/pipe.c:1181
 do_dentry_open+0x63c/0xbe0 fs/open.c:955
 vfs_open+0x4a/0x60 fs/open.c:1089
 do_open fs/namei.c:3642 [inline]
 path_openat+0x18ba/0x1d80 fs/namei.c:3799
 do_filp_open+0xf7/0x200 fs/namei.c:3826
 do_sys_openat2+0xab/0x120 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_open fs/open.c:1429 [inline]
 __se_sys_open fs/open.c:1425 [inline]
 __x64_sys_open+0xe6/0x110 fs/open.c:1425
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

value changed: 0x00000002 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2400 Comm: syz-executor.1 Tainted: G        W          6.9.0-rc2-syzkaller-00040-gb1e6ec0a0fd0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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